So I have booked a party for my child , its sitting at 20 school friends so far and at £14 a child it’s sitting at nearly £300 , problem is my child has 3 cousins , they rarely see each other and are not close plus their mum is an absolute nightmare , my hubby says I should just leave it as school friends but I would feel really bad if I don’t invite them ,, plus an extra 3 kids bring it way past our budget , but I know their mum will expect them to be invited , what should I do 🤷🏼♀️